Hello! I’m working with Rhino V5 and this is the read-out I’m getting when checking my mesh: Mesh has 28 pairs of faces that intersect each other. Although this does not necessarily mean that the mesh is bad, it can cause problems if you’re doing mesh boolean operations with it. Everything els…

Hi Anna - in theory, the command draws a line segment at each intersection, so SelCrv after the command will highlight those and you can change the color if that helps locate them. The problem I’ve found is that this command drawn many more lines than are actual intersections - that is, most of the …

[image] Anna: Is there any way to determine the location of these faces One possible way is to offset the mesh by a tiny amount and perform an intersection between the original and the offset mesh. Usually this will create polylines around or near the faces which intersect or which do have a …

Thank you very much, Pascal, I understand the problem now. Also, thanks for pointing that out to the developers. Much appreciated, Clement! This is the most comprehensive solution for this problem I’ve heard of.

Hi Pascal, Just to be sure; did you point out the fact that TestMSX is unreliable, or did you point out that it is frustrating and Kafkaesque to read that message and have no way to find those intersections, when apparently the code did find and count them. It’s like the IRS telling you there is …

[image] pascal: I understand the underlying problem of locating and fixing these self intersections, and I’ve pointed it out to the developers Hi Willem - yeah, I don’t care so much about the test command, myself, as the discrepancy between the errors reported and the tools provided… -Pasca…

Hi, the following script shows the edges which intersect face. These edges are added to the document as lines and selected. selectintrsectededge.py (1.0 KB) g

Hi Gianpaolo, this is great and should be made into a default Rhino command to delete or extract intersecting mesh faces for easier repair. Thanks for posting. c.

In the latest version of “Rhino Open Projects” http://www.food4rhino.com/project/rp there is a tool which selects vertices of self-intesection edges. You can “fix” the mesh by deleting these vertices (just run the command and press Delete).

Thanks gianpaolo for the update ! c.

This thread just made my night. Thanks for all the help!

Mesh has --- pairs of faces that intersect each other

Rhino Rhino for Windows

user263 October 29, 2021, 12:06am 21

I’m getting following error when I’m using the attached script here.
GUC_RD50_quad.3dm (419.4 KB)

script_error

Can you help me with this?

Converting stl with tet mesh into quad mesh stl

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Mesh has --- pairs of faces that intersect each other

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